Improvement in compounds for hydraulic cement



bUI-HINU UH FLADHU Ul U00 UNITED STATES HUIUIUHUU PATENT OFFICE.

ANTHONY PFUXD, OF NEW YORK, N. Y.

IMPROVEMENT IN COMPOUNDS FOR HYDRAULIC CEMENT.

Specification forming part of Letters Patent No. 135,582, dated February 4, 1873.

To all whom it may concern:

Be it known that I, Axruoxr PFUND, of the city, county, and State ot'Xew York, have invented a new and Improved Compound for Hydraulic Cement, and other purposes; and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same.

This invention is based on the treatment of and is found in the county of Nort ampton, State of Pennsylvania, and which, according to a careful analysis, contains the following ingre dients:

Silica 61.3

Alumina 21.85

Oxide of iron 14.10

Lime 1.30

Magnesia .62) Hygrometer moisture, and loss... .83

My invention consists in a compound produced by heating the Pfundite to a red h eat, whereby the silica is caused to comm't'vith the oxide of iron and with parts of the alkaline earths; and, it' this product is mixed with sulphate or carbonate of lime, the mass be comes hard in a short time and capable of resisting moisture.

I have also mixed with the Pfundite tity of carbonate of lime am a (a ies, in the propor 1011 of from t iree to four parts ot'lime to one part of silica, alumina, and oxide of iron and alkali: This mixture 1 form into Bricks, which are burned at a red heat, and when cold, mlverjged. The p'rmii't'fll iis obtained forms a supgfi r hvdraulic cement.

The ll'undite after'hav ng een l tl e t to a red l1eat,ean also be mixed with coal-ashes iiliibout the following proportion: Burned Pt'undite. one part; hvdraulic lime, cemen p aster Paris, two par s,- coa as es, veto six pa: s.

.Lnis mass, when mixed with a sufiicient quantity of water can be formed into bricks, or it can be used with advantage for coating walls or other similar purposes. The mass obtained by these means is fire-proof.

I have also mixed with the burned Pfundite a quan- .74 i f (a T j; aquantity of pulverized charcoal, sawdust )eat, ground bark, or other similar a coni ductor 0t heat, 111 about the following proportion: Lime cement, mixed with water, one part; puivaizet c iarcoal, sawdust, or other bad conductor of heat, from t rec to four parts.

After these ingredients have been thoroughly mixed, I take limeq?hvdraulic lime or )lflSftl Paris one part,- urnei l'undite, onehalf part; add thereto a sui'iicient quantity of water to produce a stifl'paste, and mix this paste wit 1 t to mste of lime and sawdust above described. his mixture 18 mo t Qt in any do- Shell form, and it can be used with advantage for filling of ice-houses or other buildings, where it is desirable to exclude the external air arid moisture.

It is obvious that these mixtures can be varied, according to the firmness required, by changing the proportions of the ingredients; but in all cases no more water must be used but just sut'licient to dissolve the lime or cement, and to inclose the materials added thereto. It the quantity of water is not too large, the mass can be molded immediately and removed from the molds in a short time.

Walls coated with the third compound above described dry quick, and they can be cleaned and whitewashed without delay. They serve to produce a dry and tire-proof building.

The fourth compound above described, being composed entirely of bad conductors of heat, produces a superior filling for the walls of ice-houses.

What I claim as new, by Letters Patent, is-

l. A compound produced by subjecting Pt'undite to a red heat, substantially as described, whether alone or previously or subsequently combined with other materials, as set forth.

2. A compound produced by burning Pfuudite, then mixing it with hydraulic lime or cement, and with sawdust, peat, charcoal, or other bad conductor of heat, substantially as set forth.

ANTHONY PFUX D.

and desire to secure 'itnesses:

W. HAUFF, E. F. KASTENHUBER.

l-ACLHHHU 

